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re PR debug/46561 (-fcompare-debug failure (length) with -O2 -ftree-vectorize -ftree-parallelize-loops)

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PR debug/46561
	* tree-parloops.c (try_create_redunction_list): Ignore debug stmts
	when looking for immediate uses.

	* gcc.dg/autopar/pr46561.c: New test.

From-SVN: r166975
This commit is contained in:
Jakub Jelinek 2010-11-20 13:14:48 +01:00 committed by Jakub Jelinek
parent 8304847453
commit 4942af9b83
4 changed files with 26 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2010-11-20 Jakub Jelinek <jakub@redhat.com>
PR debug/46561
* tree-parloops.c (try_create_redunction_list): Ignore debug stmts
when looking for immediate uses.
PR tree-optimization/45830
* stmt.c (expand_switch_using_bit_tests_p): New function.
(expand_case): Use it.

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2010-11-20 Jakub Jelinek <jakub@redhat.com>
PR debug/46561
* gcc.dg/autopar/pr46561.c: New test.
PR c++/46538
* g++.dg/other/error34.C: New test.

17
gcc/testsuite/gcc.dg/autopar/pr46561.c Normal file
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@ -0,0 +1,17 @@
/* PR debug/46561 */
/* { dg-do compile } */
/* { dg-options "-O2 -ftree-vectorize -ftree-parallelize-loops=2 -fcompare-debug" } */
extern void abort (void);
void foo (char *c)
{
int i;
unsigned x = 0;
{
for (i = 0; i < 64; i += 4)
x = x | *((unsigned *) (&c[i]));
if (x)
abort ();
}
}

3
gcc/tree-parloops.c
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@ -1870,7 +1870,8 @@ try_create_reduction_list (loop_p loop, htab_t reduction_list)
reduc_phi = NULL;
FOR_EACH_IMM_USE_FAST (use_p, imm_iter, val)
{
if (flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p))))
if (!gimple_debug_bind_p (USE_STMT (use_p))
&& flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p))))
{
reduc_phi = USE_STMT (use_p);
break;